Tester



FIG. 1 is a first perspective view of a tester showing my new design;

FIG. 2 is a second perspective view of FIG. 1;

FIG. 3 is a front elevational view of FIG. 1;

FIG. 4 is a rear elevational view of FIG. 1;

FIG. 5 is a left side view of FIG. 1;

FIG. 6 is a right side view of FIG. 1;

FIG. 7 is a top plan view of FIG. 1;

FIG. 8 is a bottom plan view of FIG. 1;

FIG. 9 is a first perspective view showing the tester in an open state;

FIG. 10 is a second perspective view of FIG. 9;

FIG. 11 is a third perspective view of FIG. 9;

FIG. 12 is a fourth perspective view of FIG. 9;

FIG. 13 is a front elevational view of FIG. 9;

FIG. 14 is a rear elevational view of FIG. 9;

FIG. 15 is a left side view of FIG. 9;

FIG. 16 is a right side view of FIG. 9;

FIG. 17 is a top plan view of FIG. 9; and,

FIG. 18 is a bottom plan view of FIG. 9.

The present application relates to the ornamental design of a tester which is used to screen both loose and mounted (ring) diamonds to determine whether such diamonds are possibly synthetic. 

CLAIM The ornamental design for a tester, as shown and described. 